We just got our first batch of chickens a couple months ago. A rooster, hen and 7 biddies. All have done fantastic, no problems. Until... Last week we were given 4 Black Star hens, over a year old. We culled 2 of them after the first day because they were missing feathers around the vent, what was there was matted, with a discharge. We washed and wiped them with warm water, gave them yogurt and oatmeal. Gave them Probios water. Within 2 days they were dead (they didn't look the healthiest when we got them by any means). By what we've read, it sounds like pasty bottom, but we're not positive. Our rooster has always seemed fine, but has started pooping a VERY bright green. They stay in their coup, so no poisoning could be happening. He's eating what he's always eaten - nothing red. His comb seems to be getting slightly darker around the edges. We're worried there could be something going on with him that could be related to the two hens that we lost. Last thing - one of the biddies, ever since we got it, has a leg that shakes. In the last couple days, sometimes it walks correctly and sometimes it's foot will be turned under. It seems slightly swollen. Any ideas? Sorry so much all at once. Thanks!